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Unverified Commit 2a9e92d3 authored by Srinivas Kandagatla's avatar Srinivas Kandagatla Committed by Mark Brown
Browse files

ASoC: qdsp6: q6asm: Add q6asm dai driver 



This patch adds support to q6asm dai driver which configures Q6ASM streams
to pass pcm data.

Signed-off-by: default avatarSrinivas Kandagatla <srinivas.kandagatla@linaro.org>
Reviewed-and-tested-by: default avatarRohit kumar <rohitkr@codeaurora.org>
Reviewed-by: default avatarBanajit Goswami <bgoswami@codeaurora.org>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 24c4cbcf

sound/soc/qcom/Kconfig

+4 −0
Original line number Diff line number Diff line
@@ -62,6 +62,9 @@ config SND_SOC_QDSP6_ROUTING 
config SND_SOC_QDSP6_ASM

	tristate



config SND_SOC_QDSP6_ASM_DAI

	tristate



config SND_SOC_QDSP6

	tristate "SoC ALSA audio driver for QDSP6"

	depends on QCOM_APR && HAS_DMA
@@ -72,6 +75,7 @@ config SND_SOC_QDSP6 
	select SND_SOC_QDSP6_ADM

	select SND_SOC_QDSP6_ROUTING

	select SND_SOC_QDSP6_ASM

	select SND_SOC_QDSP6_ASM_DAI

	help

	 To add support for MSM QDSP6 Soc Audio.

	 This will enable sound soc platform specific

sound/soc/qcom/qdsp6/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -5,3 +5,4 @@ obj-$(CONFIG_SND_SOC_QDSP6_AFE_DAI) += q6afe-dai.o 
obj-$(CONFIG_SND_SOC_QDSP6_ADM) += q6adm.o

obj-$(CONFIG_SND_SOC_QDSP6_ROUTING) += q6routing.o

obj-$(CONFIG_SND_SOC_QDSP6_ASM) += q6asm.o

obj-$(CONFIG_SND_SOC_QDSP6_ASM_DAI) += q6asm-dai.o

sound/soc/qcom/qdsp6/q6asm-dai.c

0 → 100644
+624 −0
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0

// Copyright (c) 2011-2017, The Linux Foundation. All rights reserved.

// Copyright (c) 2018, Linaro Limited



#include <linux/init.h>

#include <linux/err.h>

#include <linux/module.h>

#include <linux/platform_device.h>

#include <linux/slab.h>

#include <linux/component.h>

#include <sound/soc.h>

#include <sound/soc.h>

#include <sound/soc-dapm.h>

#include <sound/pcm.h>

#include <asm/dma.h>

#include <linux/dma-mapping.h>

#include <linux/of_device.h>

#include <sound/pcm_params.h>

#include "q6asm.h"

#include "q6routing.h"

#include "q6dsp-errno.h"



#define DRV_NAME	"q6asm-fe-dai"



#define PLAYBACK_MIN_NUM_PERIODS    2

#define PLAYBACK_MAX_NUM_PERIODS   8

#define PLAYBACK_MAX_PERIOD_SIZE    65536

#define PLAYBACK_MIN_PERIOD_SIZE    128

#define CAPTURE_MIN_NUM_PERIODS     2

#define CAPTURE_MAX_NUM_PERIODS     8

#define CAPTURE_MAX_PERIOD_SIZE     4096

#define CAPTURE_MIN_PERIOD_SIZE     320

#define SID_MASK_DEFAULT	0xF



enum stream_state {

	Q6ASM_STREAM_IDLE = 0,

	Q6ASM_STREAM_STOPPED,

	Q6ASM_STREAM_RUNNING,

};



struct q6asm_dai_rtd {

	struct snd_pcm_substream *substream;

	phys_addr_t phys;

	unsigned int pcm_size;

	unsigned int pcm_count;

	unsigned int pcm_irq_pos;       /* IRQ position */

	unsigned int periods;

	uint16_t bits_per_sample;

	uint16_t source; /* Encoding source bit mask */

	struct audio_client *audio_client;

	uint16_t session_id;

	enum stream_state state;

};



struct q6asm_dai_data {

	long long int sid;

};



static struct snd_pcm_hardware q6asm_dai_hardware_capture = {

	.info =                 (SNDRV_PCM_INFO_MMAP |

				SNDRV_PCM_INFO_BLOCK_TRANSFER |

				SNDRV_PCM_INFO_MMAP_VALID |

				SNDRV_PCM_INFO_INTERLEAVED |

				SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME),

	.formats =              (SNDRV_PCM_FMTBIT_S16_LE |

				SNDRV_PCM_FMTBIT_S24_LE),

	.rates =                SNDRV_PCM_RATE_8000_48000,

	.rate_min =             8000,

	.rate_max =             48000,

	.channels_min =         1,

	.channels_max =         4,

	.buffer_bytes_max =     CAPTURE_MAX_NUM_PERIODS *

				CAPTURE_MAX_PERIOD_SIZE,

	.period_bytes_min =	CAPTURE_MIN_PERIOD_SIZE,

	.period_bytes_max =     CAPTURE_MAX_PERIOD_SIZE,

	.periods_min =          CAPTURE_MIN_NUM_PERIODS,

	.periods_max =          CAPTURE_MAX_NUM_PERIODS,

	.fifo_size =            0,

};



static struct snd_pcm_hardware q6asm_dai_hardware_playback = {

	.info =                 (SNDRV_PCM_INFO_MMAP |

				SNDRV_PCM_INFO_BLOCK_TRANSFER |

				SNDRV_PCM_INFO_MMAP_VALID |

				SNDRV_PCM_INFO_INTERLEAVED |

				SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME),

	.formats =              (SNDRV_PCM_FMTBIT_S16_LE |

				SNDRV_PCM_FMTBIT_S24_LE),

	.rates =                SNDRV_PCM_RATE_8000_192000,

	.rate_min =             8000,

	.rate_max =             192000,

	.channels_min =         1,

	.channels_max =         8,

	.buffer_bytes_max =     (PLAYBACK_MAX_NUM_PERIODS *

				PLAYBACK_MAX_PERIOD_SIZE),

	.period_bytes_min =	PLAYBACK_MIN_PERIOD_SIZE,

	.period_bytes_max =     PLAYBACK_MAX_PERIOD_SIZE,

	.periods_min =          PLAYBACK_MIN_NUM_PERIODS,

	.periods_max =          PLAYBACK_MAX_NUM_PERIODS,

	.fifo_size =            0,

};



#define Q6ASM_FEDAI_DRIVER(num) { \

		.playback = {						\

			.stream_name = "MultiMedia"#num" Playback",	\

			.rates = (SNDRV_PCM_RATE_8000_192000|		\

					SNDRV_PCM_RATE_KNOT),		\

			.formats = (SNDRV_PCM_FMTBIT_S16_LE |		\

					SNDRV_PCM_FMTBIT_S24_LE),	\

			.channels_min = 1,				\

			.channels_max = 8,				\

			.rate_min =     8000,				\

			.rate_max =	192000,				\

		},							\

		.capture = {						\

			.stream_name = "MultiMedia"#num" Capture",	\

			.rates = (SNDRV_PCM_RATE_8000_48000|		\

					SNDRV_PCM_RATE_KNOT),		\

			.formats = (SNDRV_PCM_FMTBIT_S16_LE |		\

				    SNDRV_PCM_FMTBIT_S24_LE),		\

			.channels_min = 1,				\

			.channels_max = 4,				\

			.rate_min =     8000,				\

			.rate_max =	48000,				\

		},							\

		.name = "MultiMedia"#num,				\

		.probe = fe_dai_probe,					\

		.id = MSM_FRONTEND_DAI_MULTIMEDIA##num,			\

	}



/* Conventional and unconventional sample rate supported */

static unsigned int supported_sample_rates[] = {

	8000, 11025, 12000, 16000, 22050, 24000, 32000, 44100, 48000,

	88200, 96000, 176400, 192000

};



static struct snd_pcm_hw_constraint_list constraints_sample_rates = {

	.count = ARRAY_SIZE(supported_sample_rates),

	.list = supported_sample_rates,

	.mask = 0,

};



static void event_handler(uint32_t opcode, uint32_t token,

			  uint32_t *payload, void *priv)

{

	struct q6asm_dai_rtd *prtd = priv;

	struct snd_pcm_substream *substream = prtd->substream;



	switch (opcode) {

	case ASM_CLIENT_EVENT_CMD_RUN_DONE:

		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)

			q6asm_write_async(prtd->audio_client,

				   prtd->pcm_count, 0, 0, NO_TIMESTAMP);

		break;

	case ASM_CLIENT_EVENT_CMD_EOS_DONE:

		prtd->state = Q6ASM_STREAM_STOPPED;

		break;

	case ASM_CLIENT_EVENT_DATA_WRITE_DONE: {

		prtd->pcm_irq_pos += prtd->pcm_count;

		snd_pcm_period_elapsed(substream);

		if (prtd->state == Q6ASM_STREAM_RUNNING)

			q6asm_write_async(prtd->audio_client,

					   prtd->pcm_count, 0, 0, NO_TIMESTAMP);



		break;

		}

	case ASM_CLIENT_EVENT_DATA_READ_DONE:

		prtd->pcm_irq_pos += prtd->pcm_count;

		snd_pcm_period_elapsed(substream);

		if (prtd->state == Q6ASM_STREAM_RUNNING)

			q6asm_read(prtd->audio_client);



		break;

	default:

		break;

	}

}



static int q6asm_dai_prepare(struct snd_pcm_substream *substream)

{

	struct snd_pcm_runtime *runtime = substream->runtime;

	struct snd_soc_pcm_runtime *soc_prtd = substream->private_data;

	struct q6asm_dai_rtd *prtd = runtime->private_data;

	struct snd_soc_component *c = snd_soc_rtdcom_lookup(soc_prtd, DRV_NAME);

	struct q6asm_dai_data *pdata;

	int ret, i;



	pdata = snd_soc_component_get_drvdata(c);

	if (!pdata)

		return -EINVAL;



	if (!prtd || !prtd->audio_client) {

		pr_err("%s: private data null or audio client freed\n",

			__func__);

		return -EINVAL;

	}



	prtd->pcm_count = snd_pcm_lib_period_bytes(substream);

	prtd->pcm_irq_pos = 0;

	/* rate and channels are sent to audio driver */

	if (prtd->state) {

		/* clear the previous setup if any  */

		q6asm_cmd(prtd->audio_client, CMD_CLOSE);

		q6asm_unmap_memory_regions(substream->stream,

					   prtd->audio_client);

		q6routing_stream_close(soc_prtd->dai_link->id,

					 substream->stream);

	}



	ret = q6asm_map_memory_regions(substream->stream, prtd->audio_client,

				       prtd->phys,

				       (prtd->pcm_size / prtd->periods),

				       prtd->periods);



	if (ret < 0) {

		pr_err("Audio Start: Buffer Allocation failed rc = %d\n",

							ret);

		return -ENOMEM;

	}



	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {

		ret = q6asm_open_write(prtd->audio_client, FORMAT_LINEAR_PCM,

				       prtd->bits_per_sample);

	} else if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {

		ret = q6asm_open_read(prtd->audio_client, FORMAT_LINEAR_PCM,

				       prtd->bits_per_sample);

	}



	if (ret < 0) {

		pr_err("%s: q6asm_open_write failed\n", __func__);

		q6asm_audio_client_free(prtd->audio_client);

		prtd->audio_client = NULL;

		return -ENOMEM;

	}



	prtd->session_id = q6asm_get_session_id(prtd->audio_client);

	ret = q6routing_stream_open(soc_prtd->dai_link->id, LEGACY_PCM_MODE,

			      prtd->session_id, substream->stream);

	if (ret) {

		pr_err("%s: stream reg failed ret:%d\n", __func__, ret);

		return ret;

	}



	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {

		ret = q6asm_media_format_block_multi_ch_pcm(

				prtd->audio_client, runtime->rate,

				runtime->channels, NULL,

				prtd->bits_per_sample);

	} else if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {

		ret = q6asm_enc_cfg_blk_pcm_format_support(prtd->audio_client,

					runtime->rate, runtime->channels,

					prtd->bits_per_sample);



		/* Queue the buffers */

		for (i = 0; i < runtime->periods; i++)

			q6asm_read(prtd->audio_client);



	}

	if (ret < 0)

		pr_info("%s: CMD Format block failed\n", __func__);



	prtd->state = Q6ASM_STREAM_RUNNING;



	return 0;

}



static int q6asm_dai_trigger(struct snd_pcm_substream *substream, int cmd)

{

	int ret = 0;

	struct snd_pcm_runtime *runtime = substream->runtime;

	struct q6asm_dai_rtd *prtd = runtime->private_data;



	switch (cmd) {

	case SNDRV_PCM_TRIGGER_START:

	case SNDRV_PCM_TRIGGER_RESUME:

	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:

		ret = q6asm_run_nowait(prtd->audio_client, 0, 0, 0);

		break;

	case SNDRV_PCM_TRIGGER_STOP:

		prtd->state = Q6ASM_STREAM_STOPPED;

		ret = q6asm_cmd_nowait(prtd->audio_client, CMD_EOS);

		break;

	case SNDRV_PCM_TRIGGER_SUSPEND:

	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:

		ret = q6asm_cmd_nowait(prtd->audio_client, CMD_PAUSE);

		break;

	default:

		ret = -EINVAL;

		break;

	}



	return ret;

}



static int q6asm_dai_open(struct snd_pcm_substream *substream)

{

	struct snd_pcm_runtime *runtime = substream->runtime;

	struct snd_soc_pcm_runtime *soc_prtd = substream->private_data;

	struct snd_soc_dai *cpu_dai = soc_prtd->cpu_dai;

	struct snd_soc_component *c = snd_soc_rtdcom_lookup(soc_prtd, DRV_NAME);

	struct q6asm_dai_rtd *prtd;

	struct q6asm_dai_data *pdata;

	struct device *dev = c->dev;

	int ret = 0;

	int stream_id;



	stream_id = cpu_dai->driver->id;



	pdata = snd_soc_component_get_drvdata(c);

	if (!pdata) {

		pr_err("Drv data not found ..\n");

		return -EINVAL;

	}



	prtd = kzalloc(sizeof(struct q6asm_dai_rtd), GFP_KERNEL);

	if (prtd == NULL)

		return -ENOMEM;



	prtd->substream = substream;

	prtd->audio_client = q6asm_audio_client_alloc(dev,

				(q6asm_cb)event_handler, prtd, stream_id,

				LEGACY_PCM_MODE);

	if (!prtd->audio_client) {

		pr_info("%s: Could not allocate memory\n", __func__);

		kfree(prtd);

		return -ENOMEM;

	}



	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)

		runtime->hw = q6asm_dai_hardware_playback;

	else if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)

		runtime->hw = q6asm_dai_hardware_capture;



	ret = snd_pcm_hw_constraint_list(runtime, 0,

				SNDRV_PCM_HW_PARAM_RATE,

				&constraints_sample_rates);

	if (ret < 0)

		pr_info("snd_pcm_hw_constraint_list failed\n");

	/* Ensure that buffer size is a multiple of period size */

	ret = snd_pcm_hw_constraint_integer(runtime,

					    SNDRV_PCM_HW_PARAM_PERIODS);

	if (ret < 0)

		pr_info("snd_pcm_hw_constraint_integer failed\n");



	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {

		ret = snd_pcm_hw_constraint_minmax(runtime,

			SNDRV_PCM_HW_PARAM_BUFFER_BYTES,

			PLAYBACK_MIN_NUM_PERIODS * PLAYBACK_MIN_PERIOD_SIZE,

			PLAYBACK_MAX_NUM_PERIODS * PLAYBACK_MAX_PERIOD_SIZE);

		if (ret < 0) {

			pr_err("constraint for buffer bytes min max ret = %d\n",

									ret);

		}

	}



	ret = snd_pcm_hw_constraint_step(runtime, 0,

		SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 32);

	if (ret < 0) {

		pr_err("constraint for period bytes step ret = %d\n",

								ret);

	}

	ret = snd_pcm_hw_constraint_step(runtime, 0,

		SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 32);

	if (ret < 0) {

		pr_err("constraint for buffer bytes step ret = %d\n",

								ret);

	}



	runtime->private_data = prtd;



	snd_soc_set_runtime_hwparams(substream, &q6asm_dai_hardware_playback);



	runtime->dma_bytes = q6asm_dai_hardware_playback.buffer_bytes_max;





	if (pdata->sid < 0)

		prtd->phys = substream->dma_buffer.addr;

	else

		prtd->phys = substream->dma_buffer.addr | (pdata->sid << 32);



	snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);



	return 0;

}



static int q6asm_dai_close(struct snd_pcm_substream *substream)

{

	struct snd_pcm_runtime *runtime = substream->runtime;

	struct snd_soc_pcm_runtime *soc_prtd = substream->private_data;

	struct q6asm_dai_rtd *prtd = runtime->private_data;



	if (prtd->audio_client) {

		q6asm_cmd(prtd->audio_client, CMD_CLOSE);

		q6asm_unmap_memory_regions(substream->stream,

					   prtd->audio_client);

		q6asm_audio_client_free(prtd->audio_client);

		prtd->audio_client = NULL;

	}

	q6routing_stream_close(soc_prtd->dai_link->id,

						substream->stream);

	kfree(prtd);

	return 0;

}



static snd_pcm_uframes_t q6asm_dai_pointer(struct snd_pcm_substream *substream)

{



	struct snd_pcm_runtime *runtime = substream->runtime;

	struct q6asm_dai_rtd *prtd = runtime->private_data;



	if (prtd->pcm_irq_pos >= prtd->pcm_size)

		prtd->pcm_irq_pos = 0;



	return bytes_to_frames(runtime, (prtd->pcm_irq_pos));

}



static int q6asm_dai_mmap(struct snd_pcm_substream *substream,

				struct vm_area_struct *vma)

{



	struct snd_pcm_runtime *runtime = substream->runtime;

	struct snd_soc_pcm_runtime *soc_prtd = substream->private_data;

	struct snd_soc_component *c = snd_soc_rtdcom_lookup(soc_prtd, DRV_NAME);

	struct device *dev = c->dev;



	return dma_mmap_coherent(dev, vma,

			runtime->dma_area, runtime->dma_addr,

			runtime->dma_bytes);

}



static int q6asm_dai_hw_params(struct snd_pcm_substream *substream,

				struct snd_pcm_hw_params *params)

{

	struct snd_pcm_runtime *runtime = substream->runtime;

	struct q6asm_dai_rtd *prtd = runtime->private_data;



	prtd->pcm_size = params_buffer_bytes(params);

	prtd->periods = params_periods(params);



	switch (params_format(params)) {

	case SNDRV_PCM_FORMAT_S16_LE:

		prtd->bits_per_sample = 16;

		break;

	case SNDRV_PCM_FORMAT_S24_LE:

		prtd->bits_per_sample = 24;

		break;

	}



	return 0;

}



static struct snd_pcm_ops q6asm_dai_ops = {

	.open           = q6asm_dai_open,

	.hw_params	= q6asm_dai_hw_params,

	.close          = q6asm_dai_close,

	.ioctl          = snd_pcm_lib_ioctl,

	.prepare        = q6asm_dai_prepare,

	.trigger        = q6asm_dai_trigger,

	.pointer        = q6asm_dai_pointer,

	.mmap		= q6asm_dai_mmap,

};



static int q6asm_dai_pcm_new(struct snd_soc_pcm_runtime *rtd)

{

	struct snd_pcm_substream *psubstream, *csubstream;

	struct snd_soc_component *c = snd_soc_rtdcom_lookup(rtd, DRV_NAME);

	struct snd_pcm *pcm = rtd->pcm;

	struct device *dev;

	int size, ret;



	dev = c->dev;

	size = q6asm_dai_hardware_playback.buffer_bytes_max;

	psubstream = pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream;

	if (psubstream) {

		ret = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, dev, size,

					  &psubstream->dma_buffer);

		if (ret) {

			dev_err(dev, "Cannot allocate buffer(s)\n");

			return ret;

		}

	}



	csubstream = pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream;

	if (csubstream) {

		ret = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, dev, size,

					  &csubstream->dma_buffer);

		if (ret) {

			dev_err(dev, "Cannot allocate buffer(s)\n");

			if (psubstream)

				snd_dma_free_pages(&psubstream->dma_buffer);

			return ret;

		}

	}



	return ret;

}



static void q6asm_dai_pcm_free(struct snd_pcm *pcm)

{

	struct snd_pcm_substream *substream;

	int i;



	for (i = 0; i < ARRAY_SIZE(pcm->streams); i++) {

		substream = pcm->streams[i].substream;

		if (substream) {

			snd_dma_free_pages(&substream->dma_buffer);

			substream->dma_buffer.area = NULL;

			substream->dma_buffer.addr = 0;

		}

	}

}



static const struct snd_soc_dapm_route afe_pcm_routes[] = {

	{"MM_DL1",  NULL, "MultiMedia1 Playback" },

	{"MM_DL2",  NULL, "MultiMedia2 Playback" },

	{"MM_DL3",  NULL, "MultiMedia3 Playback" },

	{"MM_DL4",  NULL, "MultiMedia4 Playback" },

	{"MM_DL5",  NULL, "MultiMedia5 Playback" },

	{"MM_DL6",  NULL, "MultiMedia6 Playback" },

	{"MM_DL7",  NULL, "MultiMedia7 Playback" },

	{"MM_DL7",  NULL, "MultiMedia8 Playback" },

	{"MultiMedia1 Capture", NULL, "MM_UL1"},

	{"MultiMedia2 Capture", NULL, "MM_UL2"},

	{"MultiMedia3 Capture", NULL, "MM_UL3"},

	{"MultiMedia4 Capture", NULL, "MM_UL4"},

	{"MultiMedia5 Capture", NULL, "MM_UL5"},

	{"MultiMedia6 Capture", NULL, "MM_UL6"},

	{"MultiMedia7 Capture", NULL, "MM_UL7"},

	{"MultiMedia8 Capture", NULL, "MM_UL8"},



};



static int fe_dai_probe(struct snd_soc_dai *dai)

{

	struct snd_soc_dapm_context *dapm;



	dapm = snd_soc_component_get_dapm(dai->component);

	snd_soc_dapm_add_routes(dapm, afe_pcm_routes,

				ARRAY_SIZE(afe_pcm_routes));



	return 0;

}





static const struct snd_soc_component_driver q6asm_fe_dai_component = {

	.name		= DRV_NAME,

	.ops		= &q6asm_dai_ops,

	.pcm_new	= q6asm_dai_pcm_new,

	.pcm_free	= q6asm_dai_pcm_free,



};



static struct snd_soc_dai_driver q6asm_fe_dais[] = {

	Q6ASM_FEDAI_DRIVER(1),

	Q6ASM_FEDAI_DRIVER(2),

	Q6ASM_FEDAI_DRIVER(3),

	Q6ASM_FEDAI_DRIVER(4),

	Q6ASM_FEDAI_DRIVER(5),

	Q6ASM_FEDAI_DRIVER(6),

	Q6ASM_FEDAI_DRIVER(7),

	Q6ASM_FEDAI_DRIVER(8),

};



static int q6asm_dai_bind(struct device *dev, struct device *master, void *data)

{

	struct device_node *node = dev->of_node;

	struct of_phandle_args args;

	struct q6asm_dai_data *pdata;

	int rc;



	pdata = kzalloc(sizeof(struct q6asm_dai_data), GFP_KERNEL);

	if (!pdata)

		return -ENOMEM;



	rc = of_parse_phandle_with_fixed_args(node, "iommus", 1, 0, &args);

	if (rc < 0)

		pdata->sid = -1;

	else

		pdata->sid = args.args[0] & SID_MASK_DEFAULT;



	dev_set_drvdata(dev, pdata);



	return snd_soc_register_component(dev, &q6asm_fe_dai_component,

					q6asm_fe_dais,

					ARRAY_SIZE(q6asm_fe_dais));

}

static void q6asm_dai_unbind(struct device *dev, struct device *master,

			     void *data)

{

	struct q6asm_dai_data *pdata = dev_get_drvdata(dev);



	snd_soc_unregister_component(dev);



	kfree(pdata);



}



static const struct component_ops q6asm_dai_comp_ops = {

	.bind   = q6asm_dai_bind,

	.unbind = q6asm_dai_unbind,

};



static int q6asm_dai_probe(struct platform_device *pdev)

{

	return component_add(&pdev->dev, &q6asm_dai_comp_ops);

}



static int q6asm_dai_dev_remove(struct platform_device *pdev)

{

	component_del(&pdev->dev, &q6asm_dai_comp_ops);

	return 0;

}



static struct platform_driver q6asm_dai_platform_driver = {

	.driver = {

		.name = "q6asm-dai",

	},

	.probe = q6asm_dai_probe,

	.remove = q6asm_dai_dev_remove,

};

module_platform_driver(q6asm_dai_platform_driver);



MODULE_DESCRIPTION("Q6ASM dai driver");

MODULE_LICENSE("GPL v2");